diff options
Diffstat (limited to 'chapter09')
| -rw-r--r-- | chapter09/usage.xml | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/chapter09/usage.xml b/chapter09/usage.xml index 6f8d7a03f..b249096c0 100644 --- a/chapter09/usage.xml +++ b/chapter09/usage.xml @@ -35,12 +35,22 @@ <literallayout>0: halt the computer 1: single-user mode -2: multi-user mode without networking +2: reserved for customization, otherwise does the same as 3 3: multi-user mode with networking 4: reserved for customization, otherwise does the same as 3 5: same as 4, it is usually used for GUI login (like X's <command>xdm</command> or KDE's <command>kdm</command>) 6: reboot the computer</literallayout> + <note> + <para> + Classically, run level 2 above was defined as + "multi-user mode without networking", but this was only the case + many years ago when multiple users could log into a system connected via + serial ports. In today's environment it makes no sense and + we designate it now as "reserved". + </para> + </note> + </sect2> <sect2 id="conf-sysvinit" role="configuration"> @@ -127,7 +137,7 @@ EOF</userinput></screen> <para>There are a number of directories under <filename class="directory">/etc/rc.d</filename> that look like <filename class="directory">rc?.d</filename> (where ? is the number of the run-level) and - <filename class="directory">rcsysinit.d</filename>, all containing a number of + <filename class="directory">rcS.d</filename>, all containing a number of symbolic links. Some begin with a <emphasis>K</emphasis>, the others begin with an <emphasis>S</emphasis>, and all of them have two numbers following the initial letter. The K means to stop (kill) a service and the S means to start a @@ -155,7 +165,11 @@ EOF</userinput></screen> to be started. They will be called with the parameter <parameter>stop</parameter> to stop something. The logic behind this is that when a user is going to reboot or halt the system, nothing - needs to be started. The system only needs to be stopped.</para> + needs to be started, but the order of shutdown needs to be controlled. + For these run levels, all <emphasis>K</emphasis> prefixed scripts will be + run before any <emphasis>S</emphasis> prefixed scripts are run with the + <parameter>stop</parameter> parameter. + </para> <para>These are descriptions of what the arguments make the scripts do:</para> |